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. 2001 Oct-Dec;45(4):1024-9.

The spread of Salmonella gallinarum 9R vaccine strain under field conditions

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  • PMID: 11785873

The spread of Salmonella gallinarum 9R vaccine strain under field conditions

A Feberwee et al. Avian Dis. 2001 Oct-Dec.

Abstract

A live vaccine based on an attenuated Salmonella gallinarum 9R strain is in use in a Salmonella enteritidis control program in commercial layer flocks in The Netherlands. In a field study, the potential spread of the vaccine strain from vaccinated flocks to nonvaccinated flocks has been studied after both the primary and the booster injection at four different rearing farms and at one layer farm. The vaccinated and the nonvaccinated flocks were monitored at regular intervals by bacteriologic and serologic examination. In this field study, no evidence was found for the fecal spread of the vaccine strain.

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